A
Two pointers \ (O (N) \) sweep over
me dementia, and also with a half to find the right boundary, L is monotonically increasing, directly while () ++ on the line
If I were to open a long long but the output with a "% d", then I spot handstand women's shampoo
B
Doubling + differential
differential write hung up, take a large sample set are wrong, then tune tune has been successfully transferred to the code can WA0 from too small a sample, did not have time to save before the code is only so pay up
C
Gugu Gu look (in fact, because when the boss Topic B title in tune various autistic yet to figure out how we do cushions out)
looked hastily found that 30 minutes is not easy to get back on the roll tune B title a (according to at least make life difficult questions faceted search) (I like to say it will not search violence qwq, like the time when I learn every day in search of decadent)
Total: 80 80 + 0 + 0 =
In fact, in accordance with the terms of the truth, then A, B positive solution I can think of, and then A problem because mental retardation, B problem because the code is not enough ,,,, I have hung up or too weak
autistic went ,,,, yo slip